Apparatus for manufacturing composition board.



JV FERLA.

APPARATUS FOR MANUFACTURING COMPOSITION BOARD.

APPLICATION FILED MAY6|19H.

Patented Mar. 20, 1917.

UNITED STATES 'L ATENT OFFICE.

JOHN FEBLA, OF POUGHKEEPSIE, NEW YORK.

APPARATUS FOR MANUFACTURING COMPOSITION BOARD.

Application filed May 6, 1916.

To all whom it may concern:

lie it known that 1. Join FNMA, a eitizen ol' the l'nited States. and a resident of loughlwepsie. in the eounty ol l)utohess and State of New York, have invented eertain new and useful improvements in Apparatus for l\'lanufaeturing Composition Board. of \vhieh the following is a speedwation.

This invention relates to apparatus for mannl'aurturing eomposition board. partieularly to apparatus. sueh as deseribed in my prior applieation fi'er. No. 70 .435. filed July 15. MHZ. 'l'or making plastie composition board ol a plastie eontaining a eompara tively small pereenlage of moisture.

The main objeet of the present invention is to improve the maehine described in my prior applhrat-ion and to improve the work ing thereof so as to obtain from the plastic material a smooth sheet whieh travels along without stieking aml easily passes off the belt on to the metal earrving plate.

The various further objeets vill. more fully appear from the detailed description and the features of novelty will. he particularly pointed out in the claims.

in the drawings illustrating the invention,

Figure. 1 is a diagrammatie l'ragmental sectional elevation of the iu'iproved apparatus.

Fig. 2 is an enlarged l'ragmental detail view illustrating in perspeetive the trowel device.

Fig. 3 is an enlarged seetional detail view of the bridging deviee. for passing the material from the. felt belt to the eut-ofl' plate.

Fig. 4 is an of the reinforced l'elt belt.

Referring in detail to the drawings. the plastie material is led by a suitable l eed device. sueh as a. serew it) to a hopper ll and is diseharged by the oppositely rotating feed rolls 1% upon a eanvas (amvever belt 13. lhe material is ('arried by theeonveyer through sueoessive pairs of gage rollers 14. 1.5. which gage the sheet down approximately to the. desired thickness. .From the canvas bolt, the sheet of material passes between two felt eonveyer belts 1h. 17 between which the. plastic sheet of material is oompressed and tampedplown h v sueeessive pairs of pressure rolls 8 and 'lhefelt belts are washed and cleaned durin their h Specification of Letters latent.

enlarged seetional detail view ed thereabove.

'atelited Mar. 20, 1917.

Serial No. 95.900.

return travel as will be understood by referenee lo the former 1 pplieation. above men tioned. The felt bel s may absorb moisture from the top and bw tom of the material or impart. a eertain amount of moisture there to whieh (an be reg dated by wringing the fell belts more or less during the return travel. as will be r1 adily understood. All thepressure rolls are positively driven to properly gage and lamp the (mmparatively slifl' plastie. The construction described so far is substantiallv dentieal with the apparatus in my lorme application above re.- l'el'red to.

i will 1|o\\' ll('fi(l'll)k the improvements whereby the operation ol the apparatus is improved to insure the proper movement ol' the sheet oi materiil and to obtain a sheet \vhieh has a smoith linished appearance. The lower felt belt 17 is kept stretehed taut to form a Hat eoutinuous earrier for the sheet and avoidi 1g any wrinkling. To strengthen the bel .1 so that tension can be applied thereto. tle i'elt portion 17 (Fig. 4) is provided \ith a backing 17 of stronger material :au'h as eanvas or the like \vhieh. however. h is a comparatively lower absorptive 'apaeijy than the felt. This baeking is turned over at theedges l'f to impart additional strength to the felt atthe edges.

l' e \'ond the las; pair of pressure rollers 1H. 19 engaging both the upper and, lower belts. the lower helt 17 eontinues While the upper belt starts on its return run. This leaves the uppei surtaee of the sheet of material exposed to be. engaged directly by the. sueeeeding upper feed rolls. and to prevent. adhereme ol' the material thereto and at thesame time smooth out the surl'aee. of the sheet I provide a. combined oiliug and trowel d rviee as follows:

A eurved botom, trough member 20 is adjustablv moulded in standards 21, and oil is led thereto from a reservoir 22 mountlrelerably. a balile. plate extends througl the trough and forms a eoumartment inm \vhieh the oil drops and from thenee is discharged through apertures 24 to a point at the rear of the trowel. Thus the. material as it approaehes the curved bot tom trough is previously oiled. and as it passes under tl is curved bottom, the oil is uniformly spread and the sheet is smoothed out \vitl'Io-ut adie'riug to the surfaee of the.

trowel, and the succeeding pressure rollers. By manipulating the adjusting nuts on the screw rods 21, the vertical height of the trowel is adjusted in accordance with the thickness of the material.

After passing the trowel, the oiled and smoothed sheet passes through the final pair of pressure rollers 2-5, 26 particularly used 7 for embossing,

corrugating or scoring the sheet, then over a metal bridging plate 27, lying closely adjacent the crest of the small end roller 28, .and then on to the cut-off plate 29 on which the cut-off knife 30 works to sever the sheet and leave it on a metal plate 31. The latter is fed up an inclined guideway 32 in position to receive the seveied portions of the continuous sheet. It will be noted that the end roller 28 is the roller around which the belt 17 passe on its return travel andis of such small diameter that it is possible for the plate 29 to lie in close proximity of the crest thereof, and thus the plate in a. sense cleaves the material off the belt overcoming the adhesion of the ma terial to the belt. Furthermore, by reason of having a small roller of sharp curvature, sticking of the material is further reduced, as the sharp curvature forms a larger cleavage angle Whichafl'ords a mechanical advantage in separating the adhering surfaces.

1 Also, the small roller permits the guide 32 to come up at a smaller angle and thus the steel plate does not have to be bent to such anextent as when large roller is used. This reduces friction.

Having thus described my invention, I claim as new and desire to secure by Letters Patent: .j v

1. In apparatus for making plastic composition board, a traveling belt of absorbent material for carrying said shcet of plastic, said belt being provided w th" a reinforcing backing of a strong flexible material having a comparatively lower absorptive capacity than the body of the belt 51nd stretched taut to present a flat surface to the plastic sheet, an upper belt of absorbent] material, and tamping rolls in pairs abiwe' and below the belts. 1i g 2. In apparatus for making plastic composition board, a traveliiig belt of absorbent material for carrying 5 id sheet of plastic, said belt being provide with a i -cinforcing backing and stretched talut;to present a flat surface for the plastic ,sheet, an upper belt of absorbent material, talnpingrrolls lll pairs above and below the belts, the lower belt extending past the upper belt, a roll of comparatively small diameter aroundwhlch the lower belt turns to start its return travel, a

bridging plate below-the lower belt extexid ing adjacent the crest of the; small roll, and a second plate on the other side of the small roll extending to a point cosely ad acent the crest of the roll whereby the sheet of plastic is transferred frombthe belt to the second plate.

3. In apparatus for making t position board, a traveling be of absorbent material for carrying said sheet of plastic,

beyon, said upper belt, the upper feed roll directly engaging the sheet of plastic, an

oiling device disposed rearwardly of said pressure rolls a roll of cominlrat'ively small diameter aro'i'lni which the lowerbelt turns to start its return travel, a bridging plate below the lower belt extending adjacent the crest of the small roll, and a second plate on the other side of the small roll extending to a point closely adjacent the crestof the roll whereby the sheet of plastic is transferred from the belt to the second date.

'4. In apparatus for making plastic composition board, a traveling belt of absorbent material forrm'rying said sheet of. plastic, said belt being provided with a reinforcing backing and stretched taut to present a fiat plastic cointending beyondthe upper belt, an oiling'and trowel device disposed over said extension, a roll of comparatively small diameter around which the lower belt turns to start its return travel, a bridging plate below the lower belt extending adjacent the crest of the small roll, and a second-plate on the other side of the small roll, extending to a point closely adjacent the 'crest' of theroll whereby the sheet of plastic is transferred from the be; to the second plate. a

5.' In apparatus for makin position board, a traveling belt of absorbent material for carrying said sheet of plastic, a second belt of absorbent material above the first mentioned belt, tamping rolls in pairs above and below the belts, the lower belt extending beyond "the upper belt, pressure rolls engaging the sheet material and the plastic comlower belt at saidextension for transferring prevent adherence ofthe oiling and trowel device disposed rea rwa rd ly of said pressure rolls to prevent adherence of the material thereto.

7. In apparatus for making plastic composition boarrha traveling felt belt for earrying the sheet of plastic, said belt being provided with a canvas lmrkingturned over the edges to reinforce the belt, the belt being stretched taut to present a flat Surface for the plastic sheet, an upper felt belt,'and tamping rolls in pairs above and below the belts.

.8. In apparatus for making plastic composition board, comprising a pair of traveling! belts between which the sheet of plastic material is compressed and by which it is fed, the lower belt extending beyond the upper belt, a trowel device disposed orer said extension, said trowel device comprising a trough having a rounded bottom, and means for applying a lubricant fluid on the surface of the sheet of plastic rearwardly of the trowel device to prevent adherence of the plastic therelv.

' 9. In apparatus for making plastic conio'sition board comprising a pair of travelmg belts between which the sheet of plastic material is compressed and by which it is fed, the lower belt extending beyond the upper belt, a 'trowel device disposed over said extension, said trowel comprising a trough formed with a lurality of a ertures at the rear wall thereo and means or supof plastic.

10. In apparatus fn' making lastic composition board. a tra"e ing belt .or carrying the sheet of plasti n lend roll of comparatively small diaiuc ei around which the belt turns to start 1ts return travel, an inclined guide device below the return run of the belt closely adjacent to said roll forming a. eom mratively small. angle with the travelingbelt, said guide :erving to feed a carrying belt for the she t of plastic after it is cut off.

[1. ln apparatus for making )lastio composition board, a tra :eling belt or carrying the sheet of plastic, an end roll of oompara tively small diameter around which the belt turns to start its return travel, a cutoff late extendingrlosely arjaeent the crest o the roll, an inelinedgui le device below the return run of the belt closely adjacent to said roll forming a comparatively small angle with the traveling belt, said guide serving to feed a carrying belt for the sheet of plastic after it is cut oil.

Signed at New York city, in the county of New York, and State of New York, this 25th day of January A. D. 1916. JOHN FERLA.

Witnesses: I

A. T. SCHARF a, NATHAN Comm. 

